/ Dictionary / Index L laugh line: Meaning and Definition of Find definitions for: laugh' line" Pronunciation: [key] — Informal. Informal. crow's-foot (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Laughlin Air Force Base laughter Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language